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Improve note about not using the target table name in the SET clause.

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It's not related to whether an alias is used or not.
This commit is contained in:
Tom Lane 2006-01-22 20:34:11 +00:00
parent 2647ad6583
commit 16c5a471a3
1 changed files with 6 additions and 6 deletions
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12
doc/src/sgml/ref/update.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/update.sgml,v 1.35 2006/01/22 05:20:33 neilc Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/update.sgml,v 1.36 2006/01/22 20:34:11 tgl Exp $
PostgreSQL documentation
-->
@ -56,7 +56,7 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ [ AS ] <rep
You must have the <literal>UPDATE</literal> privilege on the table
to update it, as well as the <literal>SELECT</literal>
privilege to any table whose values are read in the
<replaceable class="parameter">expression</replaceable>s or
<replaceable class="parameter">expressions</replaceable> or
<replaceable class="parameter">condition</replaceable>.
</para>
</refsect1>
@ -82,9 +82,7 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ [ AS ] <rep
provided, it completely hides the actual name of the table. For
example, given <literal>UPDATE foo AS f</>, the remainder of the
<command>UPDATE</command> statement must refer to this table as
<literal>f</> not <literal>foo</>. You cannot use the alias in
the <literal>SET</literal> clause. For example, <literal>SET
f.col = 1</> is invalid.
<literal>f</> not <literal>foo</>.
</para>
</listitem>
</varlistentry>
@ -96,7 +94,9 @@ UPDATE [ ONLY ] <replaceable class="PARAMETER">table</replaceable> [ [ AS ] <rep
The name of a column in <replaceable
class="PARAMETER">table</replaceable>.
The column name can be qualified with a subfield name or array
subscript, if needed.
subscript, if needed. Do not include the table's name in the
specification of a target column &mdash; for example,
<literal>UPDATE tab SET tab.col = 1</> is invalid.
</para>
</listitem>
</varlistentry>